What Causes Itching Bumps All Over The Body With Swollen Ear?

When i came back from ma classes on this tuesday, i started to itch badly on ma thighs as soon as i removed ma jeans. while itching for a while, i encountered many small red mosquito-like bumps on the upper part of both the thighs. The itch was SO SO BAD, that i felt like scraping wid blade. Even after i got bruises it was still itching g and the bumps were not going but increasing. Slowly i realised the bumps are appearing all over ma body namely- arms, legs, stomach, neck, back and the forehead.
Before this, two weeks ago i already had a verrrrry itchy external ear n earlobes. i do not wear jwellry at all. The whole ear got swollen and became red and i got very small blisters on the ear, still itching.
I was also told that i m allergic to sunrays. Whenevr i go out in the sun, the exposed body parts starts to itch and become burning red. Later the rashes go off but sm small white patches appear on the same location.When i got this itching and mosquito-like bumps over ma body, that day itself i had gone out in the sun. So, by the evening when i returned home, i got these verry itchy bumps all ovr the body. Due to the sun i always used to get red blemishing itchy rashes on the exposed part of the body but never these ITCHY BUMPS!!!!
M curious as to wat it is as m not able to study properly and i have to!!
Please help!!